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		| Nicolas  Jonard and Eric  Schenk | 
	
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		| ''A note on compatibility and entry in a circular model of product differentiation'' | 
	
		| ( 2004, Vol. 12 No.1 ) | 
	
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		| Consider an industry in which network goods are supplied by two horizontally differentiated firms facing the threat of a potential entrant. Firms' dilemma is between occupying the product space by selling very differentiated (incompatible) goods, and supplying compatible goods that offer higher utilities hence can be charged a higher price to consumers but are also closer substitutes. The compatibility-entry-price game is solved backward when firms and consumers are located on a circular product space. It turns out that strong externalities can favour entry, as merging the networks and accommodating entry can be preferred by the incumbents. | 
	
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		| Keywords: compatibility | 
	
		| JEL: L1 - Market Structure, Firm Strategy, and Market Performance: General
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		| | Manuscript Received : Nov 10 2003 |  | Manuscript Accepted : Jan 08 2004 | 
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